Layer winding machine



Ema 12, 195

R. LORENZ ETAL ,533,382

LAYER WINDING MACHINE Filed Aug. 24, 1945 6 Sheets-Sheet l INVENTORS Leo R. LORENZ BY RILEY PATTERSON Ema 12,, 1950 a... R. LORENZ ETAL LAYER WINDING MACHINE Filed Aug. 24, 1945 6 Sheets-Sheet 2 INVENTORS LEO R. Loazruz RILEY PATTERSON Um Mm $144M D31; 112 11956 L. R. LORENZ ET AL 5 9 LAYER WINDING MACHINE Filed Aug. 24, 1945 6 Sheets-Sheet 3 INVENTORS LEO R. LORENZ RILEY PATTERSON mm, 112, 1950 n... R. LORENZ ETAL 2,533,382

LAYER WINDING MACHINE Filed Aug. 24, 1945 '6 Sheets-Sheet 4 is q R INVENTORS LEO R. LORENZ RILEY PATTERSON BY ATTORNEY 6 Sheets-Sheet 5 Fil'ed Aug. 24, 1945 l l lm o w Mm m m R mm H mm ma mm Y u in l l ln H MUT I m m m l l l I I I I I l l I I I I; HHHIFIIIIIIIII HIIUIII III :L fld N mil w m Filed Aug. 24, 1945 L. R. LORENZ EIAL.

LAYER WINDING MACHINE 6 Sheets-Sheet 6 Power J .Supply INVENTORS- fie; 1:57;?712

z'e a arse)? BY .7

Patentecl Dec. 12, 1950 LAYER WINDING MACHINE Leo R. Lorenz and Riley Patterson, Muskegon, Mich., assignors to Anaconda Wire and Cable Company, a corporation of Delaware Application August 24, 1945, Serial No. 612,360

14 Claims. (Cl. 242-455) This invention relates to layer winders for windin wires and the like on spools and has for its object the provision of an improved layer winder. The invention provides an improved layer winder especially useful for winding wires that are rectangular in cross section, having means for controlling the entire winding operation to the end that the wires do not become jammed or wedged against the sides of the spool, overlapped, or rubbed together in winding.

The invention provides a layer winding machine for effecting a precision control over the movement of a traverse guide feed including means for reversing the travel of the feed to finish one layer at a precise predetermined position and start the next layer. By means of this aspect of the invention, the last wire of each layer is laid in a precise place with respect to the sides of the spool and binding of the wire on the spool is eliminated.

One of the important features of the invention is the provision of means for varying the movement of the traverse guide to accommodate the winding of various width wires and to this end the apparatus includes index setting means for adjusting the traverse apparatus for various width wires together with an imposed precision setting means for the beginning and ending of each layer of wire.

These and other novel features of the invention will be better understood after considering the following description taken in conjunction with the accompanying drawings of one embodiment of the invention, in which:

Fig. 1 is a plan view of apparatus along line l-l of Fig. 2;

Fig. 2 is an elevational View with parts shown in section removed;

Fig. 3 is a view similar to that of Fig. 1 with other parts removed;

Fig. 4 is a sectional elevational view along line 44 of Fig. 1, parts being removed for clarity;

Fig. 5 is a fragmentary plan view with parts removed;

Fig. 6 is a fragmentary side view with parts removed;

Fig. 7 is a front view of the traverse carriage and connectin linkage;

Fig. 8 is a section taken substantially along the line 88 of Fig. 6; and

Fi 9 is a schematic wirin diagram of the switches and solenoids.

The layer winding machine illustrated in the drawings is especially adapted for the precision 9 a ther; over the traverse pulley 48 to the traverse prises a structural frame including upright posts I, 2, 3 and 4, longitudinal rails 5, 6, l and 8, end rails 9 and I0 at the winding end and II and i2 at the opposite end. The upper part of the frame includes a longitudinal face plate 20 at the front or control side of the machine and a longitudinal plate 2| along the opposite side.

The shaft 22 mounted on the supporting frame by the bearing brackets 23 and 24-carries the spool 25 which is locked against flange 25 in the usual way and secured by the locking key 26 and the spool is, accordingly, rotatable with the shaft. The spool is so set and secured on the shaft or flange 25 that the starting hole for the wire in the spool lines up with a mark on the flange and the spool starting position bears a direct relation to the position of the traverse guide. This is important because the beginnin of winding on the spool must be correlated to the beginning of movement of the traverse guide to prevent cross-winding. The electric motor 21 mounted on the lower longitudinal rails has a belt pulley 28 connected through the belt 29 to the belt pulley 30 mounted on the shaft 32. The chain spur gear 33, through the chain 34, drives the chain spur gear which is slidably mounted on the shaft 36 and pressed into frictional engagement by the spring 31 with the friction disc 38 attached to the hub 39. The gear 35 and disc 38 form a friction clutch which has the function of controllin the speed of the spool as the wire builds up on the spool. As the diameter of the coil of wire increases, the spool turns slower by reason of the slippage of the clutch. The tension of the spring 31 is adjustable by means of the knurled knob 40. The hub 39 and the gear 3'! connected thereto drive the chain spur gear 42 through the chain 43 and the gear 42 drives the shaft 22 on which the spool 25 is mounted. The spool 25 is accordingly driven at a reduced speed through a clutch which permits the spool to vary in speed progressively as the diameter of the body of wrapped wire increases.

The wire 45 coming from a payoff capstan, or other suitable source of supply not shown, passes over the floating pulley or sheave 46 slidably and freely rotatable on the shaft 41,

guidews which is in the form of a polished mineral eyelet. The traverse pulley is freely rotatable on the shaft Ell and is held in position by the yoke 52 to which the traverse guide 49 is attached, therebv securing the pulley 48 and winding of rectangular wire on a spool and comthe traverse guide 49 in fixed positions and shiftable in the longitudinal direction of the shaft 58 as a unitary structure. For convenience and simplification, we shall hereinafter call the assembly 48, 49, 58 and 52 the traverse guide. The traverse guide is connected by means of the shaft 58 to the plate 5I of the traverse carriage 53 having guide bars 54 and 55 which are held together by the plate 5|. The yoke 52 has the knurled nut 51 connected thereto and threaded over the shaft 58. The yoke may be adjusted longitudinally in either direction by turning nut 51 on the threaded part of the shaft 58. After a proper adjustment has been made, the nut 51 is secured in place by the locking nut 58. The rod 54 is slidably mounted between the rear pair of guide rollers 68 and the front pair of guide rollers 6| and the rod 55 is slidably mounted between the rear guide rollers 83 and the front guide rollers 64. The entire traverse carriage 53 is accordingly shiftable in a reciprocating rectilinear motion and the traverse guide carried thereby is capable of exceedingly fine axial adjustment by means of the nuts 51 and 58.

The apparatus for imparting the variably adjusted movement of the traverse guide will now be described. The shaft 22 has mounted thereon a chain spur gear 18 Qig 1) which drives through the chain II the chain spur gear 12 on the shaft 13. The shaft 13 driven by the gear 12 has fixed thereon a hu blito which i attached a laterally disposed finger jl 5 and also the beveled gear 76. The beveled gear 16 drives the beveled gear 11 freely rotatable on the shaft 13, through the intermediate idler gear I8. The gears 16, TI and I8 form a reversing-motion gear train, and the gear 11 has fixed thereto the lgi bjll to which is attached the laterally disposed finger 88. It is, accordingly, clear that finger 75 rotates in one direction with the shaft I3, whereas the finger 88 rotates in the opposite direction and at the same speed.

The shaft 82 has a wheel or disc 83 keyed to the shaft but slidable thereon. At QO-degree intervals near the periphery of the wheel, pairs of rollers 84 and 85 are mounted. The pairs of rollers are all identical and freely rotatable in a satellite manner on their own shafts. The wheel 83 is shiftable in both directions longitudinally on the shaft 82 a short distance by means of the shifting wheels 86 and 81, as will be described more fully hereinafter. When the wheel 83 is in one position, for example, towards the front, namely, that side on which the spool is mounted, the finger contacts one of the rollers for example 85, once during each rotation and turns it through a 90-degree arc. Each time the shaft 13 is turned once, the finger 15 rotates the shaft 82 one-quarter turn. When the wheel 83 is moved in the opposite direction along shaft 82, the finger 15 no longer contacts the rollers 85 on the front side of wheel 83 but the finger 88 contacts the rollers, such as 84 on the back side of the wheel, and turns the wheel 83 and the shaft 82 in the opposite direction and at one-quarter the speed of the shaft 13. In this manner the shaft 82 is rotated for a predetermined time in one direction and for a predetermined time in the opposite direction.

The knob 82' on shaft 82 is for the manual rotation of the shaft to move the traverse mechanism from one side to the other. This provides a means for the operator to check his adjustments of the traverse and to properly set the traverse at the correct position for the start of the winding on the reel. This is accomplished by merely turning the knob to the right or left, depending upon the desired motion of the traverse.

The shaft 82 drives the chain spur gear 88 and through the chain 89 the chain spur gear 96 mounted on and fixed to the threaded shaft 92. The threaded shaft has mounted thereon the threaded hub or nut 93 which carries an arm 94 pivotally connected thereto by the bolt 95. The traverse lever 96 (Fig. 3) is pivotally connected to the arm 94 by the bolt 91 and is also pivotally mounted at an intermediate point to the bearing assembly 98 which is adjustably secured to the frame of the machine. As best shown in Figs. 3 and 5, the traverse lever 96 is connected to the bars 54 and 55 of the traverse carriage 53. The lever 96 carries a lengthwise adjustable end portion 99 which is pivotally connected by the pin I82 to the link I83 which is pivotally connected by the pin I84 to a bracket I85 secured to both of the rods 54 and 55 (best shown in Fig, '7).

The adjustable end portion 99 of the lever 96 has a rod I86 with a worm I81 and a knurled adjustment knob I88 fixed thereto. The worm I81 engages the rack I89 fixed to the lever 96. It is accordingly possible to make minute adjustments of the length of the lever 96 by means of the control knob I88 and thereby vary the travel or throw of the traverse carriage.

As the shaft 82 is rotated in one direction, the threaded shaft 92 rotates in one direction and moves the hub 93 therealong from one extremity to the other, swinging the lever 96 on the pivotal center of the bearing 98 and this motion results in the shifting of the traverse carriage 53 of the traverse guide through its path of motion in one direction. When the rotation of the shaft 82 is reversed in the manner previously described by shifting the wheel 83, the threaded shaft 92 returns the hub 93 to its original position and moves the traverse carriage and traverse guide in the opposite direction.

The shaft 82 carries a gear H8 meshing with a gear III driving the small pinion II2 which is in turn connected to the gear H3 and in this manner gear H3 is driven at a speed greatly reduced with respect to that of shaft 82. As best shown in Figs. 1 and 2, fingers H4 and I I5 are adjustably fixed to the face of the gear II3 by the knob II6 which is threaded on the shaft I89 of gear II3. These fingers are switch actuating means and may be set at any desired radial position depending upon the times when it is desired to operate the switches presently to be described.

The shifting wheels 86 and 81 that bear against the Wheel 83 are mounted on a lever arm I I! (Fig. 1) which is pivotally mounted on the bar H8 by the bolt I28. With reference to Fig. 1, it will be seen that the lever I I! has an extension I2I slidably mounted over the shaft I22 which is also slidable in the two fixed bearings I23 and I24 against which the springs I25 and I28 bear and urge the extension I2I to assume the neutral cen-- tral position shown. In this position, the wheel 83 is so held that neither of the fingers I5 and 88 can contact with the rollers 84 and 85 and the wheel 83 is accordingly not rotated. The shaft I22 is connected at one end to the solenoid I21 and at the other end to the solenoid I28. The extension I2I of the lever I I! has a hole or notch in its end in which the end of the bar I32 is pressed by the spring I32. This bar holds the lever II! in its off-center position after it has been pushed in either direction by either solenoid I 21 or I28.

The Micro switches I38 and I3I are electrically connected to the solenoids I30 and I3I which are connected to Micro switches I30 and I3I' respectively. Switches I30" and I 3|" are electrically connected to the solenoids I21 and I28, respectively. The connections between the switches and solenoids are shown schematically in Fig. 9. The shaft 13 carries a roller 13 in engagement with the switches I30" and I3I" which permits these switches to close a circuit to the solenoids I21 and I28 only when the fingers 15 and 80 are out of engagement with the rollers of disc 83. This is done because disc 83 cannot be shifted longitudinally on the shaft 82 while driving fingers 15 and 80 are rotating disc 83 ninety degrees of a revolution.

The fingers H4 and H5 are set in a position to operate the switches I30 and I3I at the precise moment the last turn of the layer of wire is laid on each layer of the spool, thereby to stop and effect a reversal of the rotation of shaft 82, and through it to stop and reverse the movement of the traverse guide. When one of the fingers strikes the trigger I33 (Fig. 2), one of the switches for example I30, is closed by the element I34 to energize the solenoid I30. When roller 13' reaches the proper position, switch I30 is closed and solenoid I21 is energized and the shaft I22 is pushed towards the rear, thereby moving the wheel 83 towards the front, bringing the rollers 85 into contact with the fingers 15. The spring-pressed bar I32 holds the lever I I1 in the position set by the solenoid. The shaft 82 and in turn the threaded shaft 92 are thereby continuously rotated in the same direction and the hub 93 is caused to travel along the worm 92. As the rotation continues, the other finger I I4 comes into contact with the trigger I33, moving it in the opposite direction and actuating the switch I3I energizing solenoid I3I'. When roller 13 again reaches the proper position, switch I3I" is closed and solenoid I28 is energized, pushing the shaft I22 and lever II1 forward, bringing the set of shifting rollers 88 and 81 into contact with wheel 83. This causes fingers 80 to come into contact with the wheels 84, thereby causing wheel 83 to rotate in the opposite direction and to move the hub 93 along the worm shaft 92 in the opposite direction. This operation continues until the last turn of wire is wound on the layer, and when it reaches a precise position with respect to the side edge of the spool, the opposite finger, namely I I5, again comes into contact with the trigger I33 and the winding is reversed and a new layer is started.

By means of the adjustments of the positions of the fingers H4 and H5, the length of travel of the hub 93 in both directions along the threaded shaft 92 may be set. These adjustments determine the throw or length of travel of the traverse guide in both directions. However, a finer adjustment may be superimposed upon the adjustment provided by the fingers H4 and H5 by manipulating the micrometer knob I08 to make minute adjustments in the effective length of the lever 96. These adjustments determine the end extremities of each layer and may be so made that the last wrapping of wire of each layer may be placed in a precise position with respect to the inner edge of the spool. In this manner the wire may be prevented from binding against the spool and its exterior or its insulation impaired.

The apparatus of the invention includes means for effecting a minute control over the rate of travel of the traverse guide as a function of the wire width or diameter to the end that each succeeding Wrapping of wire may be placed in a precise position entirely by the traverse guide and in this manner the turns of wire of each layer may be laid in suitably spaced positions with respect to each other turn without jamming or overlapping.

The means for adjusting the location of the pivotal point at the bfiing assembly 98 to vary the speed of travel of the traverse guide with respect to the speed of rotation of the spool to adapt the apparatus for the winding of different sizes of wires will now be described. The face plate 20 has longitudinal slots I40, MI and I42 through which the shafts on the knobs I43 to I48 project. As best shown in Figs. 5, 6 and 8, the bearing I49 above the lever 96 is mounted in a frame I50 supported on brackets I5I which bear against the inside surface of the face plate 20. A corresponding bearing I49 beneath the lever 96 is similarly mounted in a frame I50 supported 0n brackets I5I' which also bear against the inside surface of the face plate. A member I53 slideable on the lever 96 is journaled in the bearings and defines the pivot point of the lever. The shafts or stems of the knobs I43, I44, I45 and I46 are screwed into the brackets I5I and I5I' and are the means by which the brackets are locked in a fixed position against the face plate 20. The knob I41 has a shaft I52 which screws into the member I53 for locking and unlocking the bearing assembly 98 to the lever 96. The

knob I48 is connected through its shaft I to the front gear wheel I54 which meshes with the rack I56 fixed to the inner surface of the face plate 20. The shaft I55 is connected at its rear to a gear I54 in mesh with the rack I56 on the under face of the lever 96. Lever 96 pivots at gear I54 but this is accomplished by using a narrow spur gear. This arrangement holds lever 96 in longitudinal alignment to plate 20.

A pointer I60 is attached to the brackets I5I and is slidable therewith in the slot I42. Suitable markings I60 are placed on the face plate 20 near the slot I 42 to correspond to the width of the wire to be wound on the spool. These markings are preferably indicated by giving the precise width of the wire.

In adjusting the apparatus to adapt the machine to wind a particular size of wire, the knobs I43 to I46 are loosened, thereby freeing the brackets I5I from their fixed contact with the face plate 20. The knob I41 is also loosened to unlock the bearing assembly 98 from the lever 96. The entire assembly, including the bearing 98 and the brackets I5I and I5I with the attached knobs, is shiftable to the right or to the ,left as desired. This shifting is accomplished by turning the knob I48, thus turning the gears I54 and I54, and by reason of their engagement with the racks I56 and I56 causing the entire unit to be shifted as desired. The pointer I60 travels with this unit, and when it is set over the index mark corresponding to the size of wire to be Wound, the four knobs I43 to I46 are tightened and the unit is locked in position. The knob I41 is then tightened to lock the bearing assembly 98 to the lever 96.

The protecting switches I and I66 are operated by actuating bars I61 and I68, respectively, which are attached to the traverse bar. These switches operate to reverse the traverse in case the mechanism previously described fails to operate. Their connection in circuit with the solenoids I21 and I28 is shown in Fig. 9.

We claim:

1. In a layer winding apparatus, the improvement which comprises means for driving a spool on which the wire is wound, a traverse guide movable back and forth across the face of the spool for directing the winding of each layer of wire on the spool, means for adjusting the limits of movement of the traverse guide to effect a precise laying of the wire with respect to the side edges of the spool, and means for adjusting the rate of travel of the traverse guide relative to the speed of rotation of the spool in accordance with the width of the wire being wound.

2. In a layer winding apparatus, the improvement which comprises means for driving a spool on which the wire is wound, a traverse guide movable back and forth across the face of the spool for directing the winding of each layer of wire on the spool, a lever fulcrumed at a point between its ends and adjustable as to length for operating the traverse guide, means for shifting the fulcrum of the lever to make adjustment in the rate of travel of the traverse guide relative to the speed of rotation of the spool, and means for adjusting the length of the lever to make adjustment in the distance of travel of the traverse guide.

3. In a layer winding apparatus, the improvement which comprises means for driving a spool on which the wire is wound, a traverse guide for directing the winding of each layer of wire on the spool, means mechanically linked to the drive shaft of the spool operating in timed relation to the movement of the traverse guide to stop the traverse guide as the last turn of wire in each layer reaches a predetermined position adjacent to the side of the spool and for reversing its travel to wind a new layer of wire, and means for varying the speed of travel of the traverse guide with respect to the speed of the spool.

4. In a layer winding apparatus, the improvement which comprises means for receiving a spool on which .the wire is wound, a traverse guide movable back and forth across the face of the spool for directing the winding of each layer on the spool, means for adjusting the distance of movement of the traverse guide, means for adjusting the rate of travel of the traverse guide relative to the speed of rotation of the spool, a unitary power means for driving the spool and traverse guide in synchronism, and electrical switch actuated means operated in synchronism with the power means for starting and stopping the traverse guide at a predetermined position adjacent to the side edges of the spool.

5. In a layer winding apparatus, the improvement which comprises means for receiving a spool on which the wire is wound, a traverse guide movable back and forth across the face of the spool for directing the winding of each layer on the spool, means for adjusting the distance of movement of the traverse guide, means for adjusting the rate of travel of the traverse guide relative to the speed of rotation of the spool for accommodating different wire widths, a unitary power means for driving the spool and traverse guide in synchronism, and an adjustable slip clutch for varying the speed of rotation of the spool as the wire builds up on the spool.

6. In a layer winding apparatus, the improvement which comprises means for receiving a spool on which the wire is wound, a traverse guide movable back and forth across the face of the spool for directing the winding of each layer on the spool, a lever connected at one end to the traverse guide and pivoted at a point between its ends,

length adjusting means on the end of the lever connected to the traverse guide by means of which the limit of travel of the travers guide is adjusted, gear means driven in synchronism with the spool for moving the lever first in one direction and then in the other, and means to adjust the position of the pivot lengthwise of the lever to vary the speed of the traverse guide relative to the speed of rotation of the spool.

'7. In a layer winding apparatus, the improvement which comprises means for receiving a spool on which the wire is wound, a traverse guide movable back and forth across the face of the spool for directing the winding of each layer on the spool, a lever connected at one end to the traverse guide and pivoted at a point between its ends, length adjusting means on the end of the lever connected to the traverse guide by means of which the limit of travel of the traverse guide is adjusted, gear means driven in synchronism with the spool for moving the lever first in one direction and then in the other, and electrical switching means operated by the gear means for reversing the travel of the lever.

8. In a layer winding apparatus, the improvement which comprises means for receiving a spool on which the wire is wound, a traverse guide movable back and forth across the face 0f the spool for directing the winding of each layer on the spool, a lever connected at one end to the traverse guide and pivoted at a point between its ends, length adjusting means on the end of the lever connected to the traverse guide by means of which the limit of travel of the traverse guide is adjusted, gear means driven in synchronism with the spool for moving the lever first in one direction and then in the other, a reversing mechanism for the lever, solenoid means for operating the reversing mechanism, and means to adjust the position of the pivot lengthwise of the lever to vary the speed of the traverse guide relative to the speed of rotation of the spool.

9. In a layer winding apparatus for winding wires of different widths evenly on a spool, the

' improvement which comprises means for receiving a spool on which the wire is wound, a traverse guide movable back and forth across the face of the spool for directing the winding of each layer on the spool, a lever connected at one end to the traverse guide and pivoted at a point between its ends, length adjusting means on the end of the lever connected to the traverse guide by means of which the limit of travel of the traverse guide is adjusted, gear means driven in synchronism with the spool for moving the lever first in one direction and then in the other, means to shift the position of the pivot lengthwise of the lever to vary the speed of the traverse guide relative to the speed of rotation of the spool, a face plate having an index of wire widths, and a pointer attached to the pivot whereby the pivot may be set to wind wires of the various widths marked on the index.

10. In a layer winding apparatus of the character described comprising a rotatable spool, spool driving means, a traverse guide movable back and forth across the face of the spool for directing the winding of each layer of a wire on the spool, and a lever connected at one end to the traverse guide for moving said guide, the improved means for actuating the lever comprising a rotatable threaded shaft, a nut on the shaft pivotally connected to the lever, and means driven by the spool driving means in synchronism therewith andconnected to the threaded shaft for rotating said shaft an amount just sufficient to advance the nut, lever, and traverse guide a distance equivalent to the width of the wire for each revolution of the spool.

11. In layer winding apparatus of the character described including a rotatable spool and a traverse guide movable back and forth across the face of the spool, means for advancing the traverse guide first in one direction and then in the other comprising a pair of spaced coaxial .hubs rotated in opposite directions but at the same speed and in synchronism with the speed of rotation of the spool, a finger on each hub, a Wheel keyed to a shaft in non-rotatable relation therewith but shiftable axially thereon with its periphery extending between the circular paths defined by rotation of the fingers on the hubs, rollers on each side of said Wheel, the rollers on one side of the wheel being in position to engage one of said fingers and thereby to effect rotation of the shaft in one direction when the wheel is shifted axially in one direction, the rollers on the other side of said wheel being in position to engage the other of said fingers and thereby to effect rotation of the shaft in the opposite direction when the wheel is shifted axially in the other direction, and means connecting the shaft and the traverse guide for advancing the traverse guide in one direction when the shaft is rotated in one direction and for advancing the traverse guide in the opposite direction when the shaft is rotated in the opposite direction.

12. In layer winding apparatus of the character described including a rotatable spool, a traverse guide movable back and forth across the face of the spool, and a lever connected at one end to the traverse guide for effecting movement thereof, a pivot assembly for the lever shiftable lengthwise thereof comprising a member slideable on the lever and defining a lever pivot axis, bearings about said pivot axis supporting said member mand il'lnturn supported on brackets, a fixed face thereby and the pivot axis of the lever along the lever and along the face plate, and means for clamping the brackets to the face plate at any desired position.

13. In layer winding apparatus of the character described including a rotatable spool, a traverse guide movable back and forth across the face of the spool, and a lever connected at one end to the traverse guide for effecting movement thereof, means for changing the length of said lever at the end connected to the traverse guide comprising an adjustable lever end portion slideable lengthwise on the lever and providing the connection to th traverse guide, a worm rack on the lever, a worm rotatable with respect to the adjustable lever end portion but axially immovable thereon and engaging said worm rack, and means for turning said worm, thereby to advance the adjustable lever end portion along the lever and change the effective length of the lever adjacent its connection to the traverse guide.

14. In a layer winding apparatus, the improvement which comprises means for driving a spool, a traverse guide movable back and forth across the face of the spool, a lever connected at one end to the traverse guide and fulcrumed at a point between its ends for operating the traverse guide, and means for shifting the fulcrum point of the lever lengthwise thereof, thereby to adjust the rate of travel of the traverse guide relative to the speed of rotation of the spool in accordance with the width of the wire being wound.

LEO R. LORENZ. RILEY PATTERSON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date rc f u} 1,028,390 Rupley June 4, 1912 M c 1,739,265 Stastney Dec. 10, 1929 2,254,220 Hubbard Sept. 2, 1941 e FOREIGN PATENTS Number Country Date w 400,926 Great Britain Oct. 23, 1933 4- 

